.navbar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 22;
    width: 100%;
    background-color: transparent;
}

// 响应式缩放到992
@media(max-width:768px) {
    .item {
        height: 500px;
    }
}

@media (max-width:992px) {
    .item {
        height: 400px;
    }
}

@media (max-width:992px) {
    .item {
        height: 250px;
    }
}

img {
    height: 100% !important;
}

.navbar-default {
    border: 0;
}

.row {
    .thumbnail {
        background-color: #70c3ff;
    }
}

h2 {
    text-align: center;
    font-weight: 100;

    span {
        font-weight: 600;
    }

    .txt {
        font-size: 16px;
        color: #919191;
    }
}

.box {

    
    div {
        background-color: skyblue;
    }
}